Finding the Fourth Proportional to 2,156.87, 3,238.54 and 1,233.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.87 : 3,238.54 = 1,233.47 : x
2. Step 2: Convert to fraction form
   2,156.87/3,238.54 = 1,233.47/x
3. Step 3: Cross multiply
   2,156.87x = 3,238.54 × 1,233.47
4. Step 4: Simplify right side
   2,156.87x = 3,994,622.66
5. Step 5: Solve for x
   x = 3,994,622.66/2,156.87
6. Step 6: Final answer
   x = 1,852.05